This Cannondale CAAD10 Headset (1 1/8 Top-1 1/4 Lower) is a genuine replacement part
compatible with CAAD10 road bike models. The kit has all you need to replace your headset with new bearings and cups.
Bearing outer Diameter : Up 41.8mm, Lower 46.8mm
Stack Height : 28mm
Threadless Integrated Type